* @brief two-peer set operations
* @author Florian Dold
*/
-
-
+#include "platform.h"
+#include "gnunet_util_lib.h"
#include "gnunet-service-set.h"
-#include "gnunet_container_lib.h"
-#include "gnunet_crypto_lib.h"
#include "ibf.h"
#include "strata_estimator.h"
#include "set_protocol.h"
* We sent the request message, and expect a strata estimator
*/
PHASE_EXPECT_SE,
+
/**
- * We sent the strata estimator, and expect an IBF
+ * We sent the strata estimator, and expect an IBF. This phase is entered once
+ * upon initialization and later via PHASE_EXPECT_ELEMENTS_AND_REQUESTS.
+ *
+ * After receiving the complete IBF, we enter PHASE_EXPECT_ELEMENTS
*/
PHASE_EXPECT_IBF,
+
/**
- * We know what type of IBF the other peer wants to send us,
- * and expect the remaining parts
+ * Continuation for multi part IBFs.
*/
PHASE_EXPECT_IBF_CONT,
+
/**
* We are sending request and elements,
* and thus only expect elements from the other peer.
+ *
+ * We are currently decoding an IBF until it can no longer be decoded,
+ * we currently send requests and expect elements
+ * The remote peer is in PHASE_EXPECT_ELEMENTS_AND_REQUESTS
*/
PHASE_EXPECT_ELEMENTS,
+
/**
* We are expecting elements and requests, and send
* requested elements back to the other peer.
+ *
+ * We are in this phase if we have SENT an IBF for the remote peer to decode.
+ * We expect requests, send elements or could receive an new IBF, which takes
+ * us via PHASE_EXPECT_IBF to phase PHASE_EXPECT_ELEMENTS
+ *
+ * The remote peer is thus in:
+ * PHASE_EXPECT_ELEMENTS
*/
PHASE_EXPECT_ELEMENTS_AND_REQUESTS,
+
/**
* The protocol is over.
* Results may still have to be sent to the client.
/**
- * State of an evaluate operation
- * with another peer.
+ * State of an evaluate operation with another peer.
*/
struct OperationState
{
- /**
- * Tunnel to the remote peer.
- */
- struct GNUNET_MESH_Tunnel *tunnel;
-
- /**
- * Detail information about the set operation,
- * including the set to use.
- */
- struct OperationSpecification *spec;
-
- /**
- * Message queue for the peer.
- */
- struct GNUNET_MQ_Handle *mq;
-
- /**
- * Number of ibf buckets received
- */
- unsigned int ibf_buckets_received;
/**
* Copy of the set's strata estimator at the time of
struct GNUNET_CONTAINER_MultiHashMap32 *key_to_element;
/**
- * Current state of the operation.
+ * Iterator for sending elements on the key to element mapping to the client.
*/
- enum UnionOperationPhase phase;
+ struct GNUNET_CONTAINER_MultiHashMap32Iterator *full_result_iter;
/**
- * Generation in which the operation handle
- * was created.
+ * Current state of the operation.
*/
- unsigned int generation_created;
+ enum UnionOperationPhase phase;
/**
- * Set state of the set that this operation
- * belongs to.
- */
- struct Set *set;
-
- /**
- * Evaluate operations are held in
- * a linked list.
+ * Did we send the client that we are done?
*/
- struct OperationState *next;
-
- /**
- * Evaluate operations are held in
- * a linked list.
- */
- struct OperationState *prev;
+ int client_done_sent;
/**
- * Did we send the client that we are done?
+ * Number of ibf buckets received
*/
- int client_done_sent;
+ unsigned int ibf_buckets_received;
+
};
struct IBF_Key ibf_key;
/**
- * The actual element associated with the key
+ * The actual element associated with the key.
*/
struct ElementEntry *element;
/**
* Element that collides with this element
- * on the ibf key
+ * on the ibf key. All colliding entries must have the same ibf key.
*/
struct KeyEntry *next_colliding;
};
* Operation for which the elements
* should be sent.
*/
- struct OperationState *eo;
+ struct Operation *op;
};
* salt=0.
*/
struct StrataEstimator *se;
-
- /**
- * Evaluate operations are held in
- * a linked list.
- */
- struct OperationState *ops_head;
-
- /**
- * Evaluate operations are held in
- * a linked list.
- */
- struct OperationState *ops_tail;
};
* @param cls closure
* @param key current key code
* @param value value in the hash map
- * @return GNUNET_YES if we should continue to
+ * @return #GNUNET_YES if we should continue to
* iterate,
- * GNUNET_NO if not.
+ * #GNUNET_NO if not.
*/
static int
destroy_key_to_element_iter (void *cls,
void *value)
{
struct KeyEntry *k = value;
-
+ /* destroy the linked list of colliding ibf key entries */
while (NULL != k)
{
struct KeyEntry *k_tmp = k;
/**
- * Destroy a union operation, and free all resources
- * associated with it.
+ * Destroy the union operation. Only things specific to the union operation are destroyed.
*
- * @param eo the union operation to destroy
+ * @param op union operation to destroy
*/
static void
-union_operation_destroy (struct OperationState *eo)
+union_op_cancel (struct Operation *op)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying union op\n");
- GNUNET_CONTAINER_DLL_remove (eo->set->state->ops_head,
- eo->set->state->ops_tail,
- eo);
- if (NULL != eo->mq)
- {
- GNUNET_MQ_destroy (eo->mq);
- eo->mq = NULL;
- }
- if (NULL != eo->tunnel)
+ /* check if the op was canceled twice */
+ GNUNET_assert (NULL != op->state);
+ if (NULL != op->state->remote_ibf)
{
- struct GNUNET_MESH_Tunnel *t = eo->tunnel;
- eo->tunnel = NULL;
- GNUNET_MESH_tunnel_destroy (t);
+ ibf_destroy (op->state->remote_ibf);
+ op->state->remote_ibf = NULL;
}
- if (NULL != eo->remote_ibf)
+ if (NULL != op->state->local_ibf)
{
- ibf_destroy (eo->remote_ibf);
- eo->remote_ibf = NULL;
+ ibf_destroy (op->state->local_ibf);
+ op->state->local_ibf = NULL;
}
- if (NULL != eo->local_ibf)
+ if (NULL != op->state->se)
{
- ibf_destroy (eo->local_ibf);
- eo->local_ibf = NULL;
+ strata_estimator_destroy (op->state->se);
+ op->state->se = NULL;
}
- if (NULL != eo->se)
+ if (NULL != op->state->key_to_element)
{
- strata_estimator_destroy (eo->se);
- eo->se = NULL;
+ GNUNET_CONTAINER_multihashmap32_iterate (op->state->key_to_element, destroy_key_to_element_iter, NULL);
+ GNUNET_CONTAINER_multihashmap32_destroy (op->state->key_to_element);
+ op->state->key_to_element = NULL;
}
- if (NULL != eo->key_to_element)
- {
- GNUNET_CONTAINER_multihashmap32_iterate (eo->key_to_element, destroy_key_to_element_iter, NULL);
- GNUNET_CONTAINER_multihashmap32_destroy (eo->key_to_element);
- eo->key_to_element = NULL;
- }
- if (NULL != eo->spec)
- {
- if (NULL != eo->spec->context_msg)
- {
- GNUNET_free (eo->spec->context_msg);
- eo->spec->context_msg = NULL;
- }
- GNUNET_free (eo->spec);
- eo->spec = NULL;
- }
- GNUNET_free (eo);
-
+ GNUNET_free (op->state);
+ op->state = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying union op done\n");
-
- /* FIXME: do a garbage collection of the set generations */
}
* Inform the client that the union operation has failed,
* and proceed to destroy the evaluate operation.
*
- * @param eo the union operation to fail
+ * @param op the union operation to fail
*/
static void
-fail_union_operation (struct OperationState *eo)
+fail_union_operation (struct Operation *op)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SET_ResultMessage *msg;
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "union operation failed\n");
+
ev = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_SET_RESULT);
msg->result_status = htons (GNUNET_SET_STATUS_FAILURE);
- msg->request_id = htonl (eo->spec->client_request_id);
+ msg->request_id = htonl (op->spec->client_request_id);
msg->element_type = htons (0);
- GNUNET_MQ_send (eo->spec->set->client_mq, ev);
- union_operation_destroy (eo);
+ GNUNET_MQ_send (op->spec->set->client_mq, ev);
+ _GSS_operation_destroy (op, GNUNET_YES);
}
/**
- * Derive the IBF key from a hash code and
+ * Derive the IBF key from a hash code and
* a salt.
*
* @param src the hash code
* @return the derived IBF key
*/
static struct IBF_Key
-get_ibf_key (struct GNUNET_HashCode *src, uint16_t salt)
+get_ibf_key (const struct GNUNET_HashCode *src, uint16_t salt)
{
struct IBF_Key key;
/**
- * Send a request for the evaluate operation to a remote peer
+ * Iterator to create the mapping between ibf keys
+ * and element entries.
*
- * @param eo operation with the other peer
+ * @param cls closure
+ * @param key current key code
+ * @param value value in the hash map
+ * @return #GNUNET_YES if we should continue to
+ * iterate,
+ * #GNUNET_NO if not.
*/
-static void
-send_operation_request (struct OperationState *eo)
+static int
+op_register_element_iterator (void *cls,
+ uint32_t key,
+ void *value)
{
- struct GNUNET_MQ_Envelope *ev;
- struct OperationRequestMessage *msg;
-
- ev = GNUNET_MQ_msg_nested_mh (msg, GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST,
- eo->spec->context_msg);
-
- if (NULL == ev)
- {
- /* the context message is too large */
- GNUNET_break (0);
- GNUNET_SERVER_client_disconnect (eo->spec->set->client);
- return;
- }
- msg->operation = htonl (GNUNET_SET_OPERATION_UNION);
- msg->app_id = eo->spec->app_id;
- msg->salt = htonl (eo->spec->salt);
- GNUNET_MQ_send (eo->mq, ev);
-
- if (NULL != eo->spec->context_msg)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sent op request with context message\n");
- else
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sent op request without context message\n");
+ struct KeyEntry *const new_k = cls;
+ struct KeyEntry *old_k = value;
- if (NULL != eo->spec->context_msg)
+ GNUNET_assert (NULL != old_k);
+ /* check if our ibf key collides with the ibf key in the existing entry */
+ if (old_k->ibf_key.key_val == new_k->ibf_key.key_val)
{
- GNUNET_free (eo->spec->context_msg);
- eo->spec->context_msg = NULL;
+ /* insert the the new key in the collision chain */
+ new_k->next_colliding = old_k->next_colliding;
+ old_k->next_colliding = new_k;
+ /* signal to the caller that we were able to insert into a colliding bucket */
+ return GNUNET_NO;
}
-
+ return GNUNET_YES;
}
* @param cls closure
* @param key current key code
* @param value value in the hash map
- * @return GNUNET_YES if we should continue to
+ * @return #GNUNET_YES if we should continue to
* iterate,
- * GNUNET_NO if not.
+ * #GNUNET_NO if not.
*/
static int
-op_register_element_iterator (void *cls,
+op_has_element_iterator (void *cls,
uint32_t key,
void *value)
{
- struct KeyEntry *const new_k = cls;
- struct KeyEntry *old_k = value;
+ struct GNUNET_HashCode *element_hash = cls;
+ struct KeyEntry *k = value;
- GNUNET_assert (NULL != old_k);
- do
+ GNUNET_assert (NULL != k);
+ while (NULL != k)
{
- if (old_k->ibf_key.key_val == new_k->ibf_key.key_val)
- {
- new_k->next_colliding = old_k->next_colliding;
- old_k->next_colliding = new_k;
+ if (0 == GNUNET_CRYPTO_hash_cmp (&k->element->element_hash, element_hash))
return GNUNET_NO;
- }
- old_k = old_k->next_colliding;
- } while (NULL != old_k);
+ k = k->next_colliding;
+ }
return GNUNET_YES;
}
+/**
+ * Determine whether the given element is already in the operation's element
+ * set.
+ *
+ * @param op operation that should be tested for 'element_hash'
+ * @param element_hash hash of the element to look for
+ * @return #GNUNET_YES if the element has been found, #GNUNET_NO otherwise
+ */
+static int
+op_has_element (struct Operation *op, const struct GNUNET_HashCode *element_hash)
+{
+ int ret;
+ struct IBF_Key ibf_key;
+
+ ibf_key = get_ibf_key (element_hash, op->spec->salt);
+ ret = GNUNET_CONTAINER_multihashmap32_get_multiple (op->state->key_to_element,
+ (uint32_t) ibf_key.key_val,
+ op_has_element_iterator, (void *) element_hash);
+
+ /* was the iteration aborted because we found the element? */
+ if (GNUNET_SYSERR == ret)
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+
/**
* Insert an element into the union operation's
* key-to-element mapping. Takes ownership of 'ee'.
* This is done to speed up re-tried operations, if some elements
* were transmitted, and then the IBF fails to decode.
*
- * @param eo the union operation
+ * @param op the union operation
* @param ee the element entry
*/
static void
-op_register_element (struct OperationState *eo, struct ElementEntry *ee)
+op_register_element (struct Operation *op,
+ struct ElementEntry *ee)
{
int ret;
struct IBF_Key ibf_key;
struct KeyEntry *k;
- ibf_key = get_ibf_key (&ee->element_hash, eo->spec->salt);
+ ibf_key = get_ibf_key (&ee->element_hash, op->spec->salt);
k = GNUNET_new (struct KeyEntry);
k->element = ee;
k->ibf_key = ibf_key;
- ret = GNUNET_CONTAINER_multihashmap32_get_multiple (eo->key_to_element,
+ ret = GNUNET_CONTAINER_multihashmap32_get_multiple (op->state->key_to_element,
(uint32_t) ibf_key.key_val,
op_register_element_iterator, k);
if (GNUNET_SYSERR == ret)
return;
- GNUNET_CONTAINER_multihashmap32_put (eo->key_to_element, (uint32_t) ibf_key.key_val, k,
+ GNUNET_CONTAINER_multihashmap32_put (op->state->key_to_element, (uint32_t) ibf_key.key_val, k,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
const struct GNUNET_HashCode *key,
void *value)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct ElementEntry *e = value;
/* make sure that the element belongs to the set at the time
* of creating the operation */
- if ( (e->generation_added > eo->generation_created) ||
+ if ( (e->generation_added > op->generation_created) ||
( (GNUNET_YES == e->removed) &&
- (e->generation_removed < eo->generation_created)))
+ (e->generation_removed < op->generation_created)))
return GNUNET_YES;
GNUNET_assert (GNUNET_NO == e->remote);
- op_register_element (eo, e);
+ op_register_element (op, e);
return GNUNET_YES;
}
* Create an ibf with the operation's elements
* of the specified size
*
- * @param eo the union operation
+ * @param op the union operation
* @param size size of the ibf to create
*/
static void
-prepare_ibf (struct OperationState *eo, uint16_t size)
+prepare_ibf (struct Operation *op, uint16_t size)
{
- if (NULL == eo->key_to_element)
+ if (NULL == op->state->key_to_element)
{
unsigned int len;
- len = GNUNET_CONTAINER_multihashmap_size (eo->set->elements);
- eo->key_to_element = GNUNET_CONTAINER_multihashmap32_create (len + 1);
- GNUNET_CONTAINER_multihashmap_iterate (eo->set->elements,
- init_key_to_element_iterator, eo);
+ len = GNUNET_CONTAINER_multihashmap_size (op->spec->set->elements);
+ op->state->key_to_element = GNUNET_CONTAINER_multihashmap32_create (len + 1);
+ GNUNET_CONTAINER_multihashmap_iterate (op->spec->set->elements,
+ init_key_to_element_iterator, op);
}
- if (NULL != eo->local_ibf)
- ibf_destroy (eo->local_ibf);
- eo->local_ibf = ibf_create (size, SE_IBF_HASH_NUM);
- GNUNET_CONTAINER_multihashmap32_iterate (eo->key_to_element,
- prepare_ibf_iterator, eo->local_ibf);
+ if (NULL != op->state->local_ibf)
+ ibf_destroy (op->state->local_ibf);
+ op->state->local_ibf = ibf_create (size, SE_IBF_HASH_NUM);
+ GNUNET_CONTAINER_multihashmap32_iterate (op->state->key_to_element,
+ prepare_ibf_iterator, op->state->local_ibf);
}
/**
* Send an ibf of appropriate size.
*
- * @param eo the union operation
+ * @param op the union operation
* @param ibf_order order of the ibf to send, size=2^order
*/
static void
-send_ibf (struct OperationState *eo, uint16_t ibf_order)
+send_ibf (struct Operation *op, uint16_t ibf_order)
{
unsigned int buckets_sent = 0;
struct InvertibleBloomFilter *ibf;
- prepare_ibf (eo, 1<<ibf_order);
+ prepare_ibf (op, 1<<ibf_order);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending ibf of size %u\n", 1<<ibf_order);
- ibf = eo->local_ibf;
+ ibf = op->state->local_ibf;
while (buckets_sent < (1 << ibf_order))
{
buckets_in_message = MAX_BUCKETS_PER_MESSAGE;
ev = GNUNET_MQ_msg_extra (msg, buckets_in_message * IBF_BUCKET_SIZE,
- GNUNET_MESSAGE_TYPE_SET_P2P_IBF);
+ GNUNET_MESSAGE_TYPE_SET_UNION_P2P_IBF);
msg->reserved = 0;
msg->order = ibf_order;
msg->offset = htons (buckets_sent);
buckets_sent += buckets_in_message;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ibf chunk size %u, %u/%u sent\n",
buckets_in_message, buckets_sent, 1<<ibf_order);
- GNUNET_MQ_send (eo->mq, ev);
+ GNUNET_MQ_send (op->mq, ev);
}
- eo->phase = PHASE_EXPECT_ELEMENTS_AND_REQUESTS;
+ op->state->phase = PHASE_EXPECT_ELEMENTS_AND_REQUESTS;
}
/**
* Send a strata estimator to the remote peer.
*
- * @param eo the union operation with the remote peer
+ * @param op the union operation with the remote peer
*/
static void
-send_strata_estimator (struct OperationState *eo)
+send_strata_estimator (struct Operation *op)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_MessageHeader *strata_msg;
ev = GNUNET_MQ_msg_header_extra (strata_msg,
SE_STRATA_COUNT * IBF_BUCKET_SIZE * SE_IBF_SIZE,
- GNUNET_MESSAGE_TYPE_SET_P2P_SE);
- strata_estimator_write (eo->set->state->se, &strata_msg[1]);
- GNUNET_MQ_send (eo->mq, ev);
- eo->phase = PHASE_EXPECT_IBF;
+ GNUNET_MESSAGE_TYPE_SET_UNION_P2P_SE);
+ strata_estimator_write (op->state->se, &strata_msg[1]);
+ GNUNET_MQ_send (op->mq, ev);
+ op->state->phase = PHASE_EXPECT_IBF;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sent SE, expecting IBF\n");
}
static void
handle_p2p_strata_estimator (void *cls, const struct GNUNET_MessageHeader *mh)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct StrataEstimator *remote_se;
int diff;
- if (eo->phase != PHASE_EXPECT_SE)
+ if (op->state->phase != PHASE_EXPECT_SE)
{
- fail_union_operation (eo);
+ fail_union_operation (op);
GNUNET_break (0);
return;
}
remote_se = strata_estimator_create (SE_STRATA_COUNT, SE_IBF_SIZE,
SE_IBF_HASH_NUM);
strata_estimator_read (&mh[1], remote_se);
- GNUNET_assert (NULL != eo->se);
- diff = strata_estimator_difference (remote_se, eo->se);
+ GNUNET_assert (NULL != op->state->se);
+ diff = strata_estimator_difference (remote_se, op->state->se);
strata_estimator_destroy (remote_se);
- strata_estimator_destroy (eo->se);
- eo->se = NULL;
+ strata_estimator_destroy (op->state->se);
+ op->state->se = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got se diff=%d, using ibf size %d\n",
diff, 1<<get_order_from_difference (diff));
- send_ibf (eo, get_order_from_difference (diff));
+ send_ibf (op, get_order_from_difference (diff));
}
{
struct SendElementClosure *sec = cls;
struct IBF_Key ibf_key = sec->ibf_key;
- struct OperationState *eo = sec->eo;
+ struct Operation *op = sec->op;
struct KeyEntry *ke = value;
if (ke->ibf_key.key_val != ibf_key.key_val)
memcpy (&mh[1], element->data, element->size);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending element (%s) to peer\n",
GNUNET_h2s (&ke->element->element_hash));
- GNUNET_MQ_send (eo->mq, ev);
+ GNUNET_MQ_send (op->mq, ev);
ke = ke->next_colliding;
}
return GNUNET_NO;
* Send all elements that have the specified IBF key
* to the remote peer of the union operation
*
- * @param eo union operation
+ * @param op union operation
* @param ibf_key IBF key of interest
*/
static void
-send_elements_for_key (struct OperationState *eo, struct IBF_Key ibf_key)
+send_elements_for_key (struct Operation *op, struct IBF_Key ibf_key)
{
struct SendElementClosure send_cls;
send_cls.ibf_key = ibf_key;
- send_cls.eo = eo;
- GNUNET_CONTAINER_multihashmap32_get_multiple (eo->key_to_element, (uint32_t) ibf_key.key_val,
- &send_element_iterator, &send_cls);
+ send_cls.op = op;
+ (void) GNUNET_CONTAINER_multihashmap32_get_multiple (op->state->key_to_element,
+ (uint32_t) ibf_key.key_val,
+ &send_element_iterator, &send_cls);
}
* Decode which elements are missing on each side, and
* send the appropriate elemens and requests
*
- * @param eo union operation
+ * @param op union operation
*/
static void
-decode_and_send (struct OperationState *eo)
+decode_and_send (struct Operation *op)
{
struct IBF_Key key;
struct IBF_Key last_key;
unsigned int num_decoded;
struct InvertibleBloomFilter *diff_ibf;
- GNUNET_assert (PHASE_EXPECT_ELEMENTS == eo->phase);
+ GNUNET_assert (PHASE_EXPECT_ELEMENTS == op->state->phase);
- prepare_ibf (eo, eo->remote_ibf->size);
- diff_ibf = ibf_dup (eo->local_ibf);
- ibf_subtract (diff_ibf, eo->remote_ibf);
-
- ibf_destroy (eo->remote_ibf);
- eo->remote_ibf = NULL;
+ prepare_ibf (op, op->state->remote_ibf->size);
+ diff_ibf = ibf_dup (op->state->local_ibf);
+ ibf_subtract (diff_ibf, op->state->remote_ibf);
+
+ ibf_destroy (op->state->remote_ibf);
+ op->state->remote_ibf = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "decoding IBF (size=%u)\n", diff_ibf->size);
next_order++;
if (next_order <= MAX_IBF_ORDER)
{
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"decoding failed, sending larger ibf (size %u)\n",
1<<next_order);
- send_ibf (eo, next_order);
+ send_ibf (op, next_order);
}
else
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"set union failed: reached ibf limit\n");
}
break;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "transmitted all values, sending DONE\n");
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SET_P2P_DONE);
- GNUNET_MQ_send (eo->mq, ev);
+ GNUNET_MQ_send (op->mq, ev);
break;
}
if (1 == side)
{
- send_elements_for_key (eo, key);
+ send_elements_for_key (op, key);
}
else if (-1 == side)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_MessageHeader *msg;
- /* FIXME: before sending the request, check if we may just have the element */
- /* FIXME: merge multiple requests */
- /* FIXME: remember somewhere that we already requested the element,
- * so that we don't request it again with the next ibf if decoding fails */
+ /* It may be nice to merge multiple requests, but with cadet's corking it is not worth
+ * the effort additional complexity. */
ev = GNUNET_MQ_msg_header_extra (msg, sizeof (struct IBF_Key),
GNUNET_MESSAGE_TYPE_SET_P2P_ELEMENT_REQUESTS);
-
+
*(struct IBF_Key *) &msg[1] = key;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending element request\n");
- GNUNET_MQ_send (eo->mq, ev);
+ GNUNET_MQ_send (op->mq, ev);
}
else
{
static void
handle_p2p_ibf (void *cls, const struct GNUNET_MessageHeader *mh)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct IBFMessage *msg = (struct IBFMessage *) mh;
unsigned int buckets_in_message;
- if ( (eo->phase == PHASE_EXPECT_ELEMENTS_AND_REQUESTS) ||
- (eo->phase == PHASE_EXPECT_IBF) )
+ if ( (op->state->phase == PHASE_EXPECT_ELEMENTS_AND_REQUESTS) ||
+ (op->state->phase == PHASE_EXPECT_IBF) )
{
- eo->phase = PHASE_EXPECT_IBF_CONT;
- GNUNET_assert (NULL == eo->remote_ibf);
+ op->state->phase = PHASE_EXPECT_IBF_CONT;
+ GNUNET_assert (NULL == op->state->remote_ibf);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "creating new ibf of size %u\n", 1<<msg->order);
- eo->remote_ibf = ibf_create (1<<msg->order, SE_IBF_HASH_NUM);
- eo->ibf_buckets_received = 0;
+ op->state->remote_ibf = ibf_create (1<<msg->order, SE_IBF_HASH_NUM);
+ op->state->ibf_buckets_received = 0;
if (0 != ntohs (msg->offset))
{
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
}
- else if (eo->phase == PHASE_EXPECT_IBF_CONT)
+ else if (op->state->phase == PHASE_EXPECT_IBF_CONT)
{
- if ( (ntohs (msg->offset) != eo->ibf_buckets_received) ||
- (1<<msg->order != eo->remote_ibf->size) )
+ if ( (ntohs (msg->offset) != op->state->ibf_buckets_received) ||
+ (1<<msg->order != op->state->remote_ibf->size) )
{
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
}
if (0 == buckets_in_message)
{
GNUNET_break_op (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
if ((ntohs (msg->header.size) - sizeof *msg) != buckets_in_message * IBF_BUCKET_SIZE)
{
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
-
- ibf_read_slice (&msg[1], eo->ibf_buckets_received, buckets_in_message, eo->remote_ibf);
- eo->ibf_buckets_received += buckets_in_message;
- if (eo->ibf_buckets_received == eo->remote_ibf->size)
+ ibf_read_slice (&msg[1], op->state->ibf_buckets_received, buckets_in_message, op->state->remote_ibf);
+ op->state->ibf_buckets_received += buckets_in_message;
+
+ if (op->state->ibf_buckets_received == op->state->remote_ibf->size)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "received full ibf\n");
- eo->phase = PHASE_EXPECT_ELEMENTS;
- decode_and_send (eo);
+ op->state->phase = PHASE_EXPECT_ELEMENTS;
+ decode_and_send (op);
}
}
* Send a result message to the client indicating
* that there is a new element.
*
- * @param eo union operation
+ * @param op union operation
* @param element element to send
*/
static void
-send_client_element (struct OperationState *eo,
+send_client_element (struct Operation *op,
struct GNUNET_SET_Element *element)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SET_ResultMessage *rm;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending element (size %u) to client\n", element->size);
- GNUNET_assert (0 != eo->spec->client_request_id);
+ GNUNET_assert (0 != op->spec->client_request_id);
ev = GNUNET_MQ_msg_extra (rm, element->size, GNUNET_MESSAGE_TYPE_SET_RESULT);
if (NULL == ev)
{
return;
}
rm->result_status = htons (GNUNET_SET_STATUS_OK);
- rm->request_id = htonl (eo->spec->client_request_id);
- rm->element_type = element->type;
+ rm->request_id = htonl (op->spec->client_request_id);
+ rm->element_type = element->element_type;
memcpy (&rm[1], element->data, element->size);
- GNUNET_MQ_send (eo->spec->set->client_mq, ev);
+ GNUNET_MQ_send (op->spec->set->client_mq, ev);
}
/**
- * Send a result message to the client indicating
- * that the operation is over.
- * After the result done message has been sent to the client,
- * destroy the evaluate operation.
+ * Signal to the client that the operation has finished and
+ * destroy the operation.
*
- * @param eo union operation
+ * @param cls operation to destroy
*/
static void
-send_client_done_and_destroy (struct OperationState *eo)
+send_done_and_destroy (void *cls)
{
+ struct Operation *op = cls;
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SET_ResultMessage *rm;
-
- GNUNET_assert (GNUNET_NO == eo->client_done_sent);
-
- eo->client_done_sent = GNUNET_YES;
+ int keep = op->keep;
ev = GNUNET_MQ_msg (rm, GNUNET_MESSAGE_TYPE_SET_RESULT);
- rm->request_id = htonl (eo->spec->client_request_id);
+ rm->request_id = htonl (op->spec->client_request_id);
rm->result_status = htons (GNUNET_SET_STATUS_DONE);
rm->element_type = htons (0);
- GNUNET_MQ_send (eo->spec->set->client_mq, ev);
+ GNUNET_MQ_send (op->spec->set->client_mq, ev);
+ _GSS_operation_destroy (op, GNUNET_YES);
+ if (GNUNET_YES == keep)
+ GNUNET_free (op);
+}
+
+
+/**
+ * Send all remaining elements in the full result iterator.
+ *
+ * @param cls operation
+ */
+static void
+send_remaining_elements (void *cls)
+{
+ struct Operation *op = cls;
+ struct KeyEntry *ke;
+ int res;
- union_operation_destroy (eo);
+ res = GNUNET_CONTAINER_multihashmap32_iterator_next (op->state->full_result_iter, NULL, (const void **) &ke);
+ if (GNUNET_NO == res)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending done and destroy because iterator ran out\n");
+ send_done_and_destroy (op);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending elements from key entry\n");
+
+ while (1)
+ {
+ struct GNUNET_MQ_Envelope *ev;
+ struct GNUNET_SET_ResultMessage *rm;
+ struct GNUNET_SET_Element *element;
+ element = &ke->element->element;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending element (size %u) to client (full set)\n", element->size);
+ GNUNET_assert (0 != op->spec->client_request_id);
+ ev = GNUNET_MQ_msg_extra (rm, element->size, GNUNET_MESSAGE_TYPE_SET_RESULT);
+ if (NULL == ev)
+ {
+ GNUNET_MQ_discard (ev);
+ GNUNET_break (0);
+ continue;
+ }
+ rm->result_status = htons (GNUNET_SET_STATUS_OK);
+ rm->request_id = htonl (op->spec->client_request_id);
+ rm->element_type = element->element_type;
+ memcpy (&rm[1], element->data, element->size);
+ if (ke->next_colliding == NULL)
+ {
+ GNUNET_MQ_notify_sent (ev, send_remaining_elements, op);
+ GNUNET_MQ_send (op->spec->set->client_mq, ev);
+ break;
+ }
+ GNUNET_MQ_send (op->spec->set->client_mq, ev);
+ ke = ke->next_colliding;
+ }
+}
+
+
+/**
+ * Send a result message to the client indicating
+ * that the operation is over.
+ * After the result done message has been sent to the client,
+ * destroy the evaluate operation.
+ *
+ * @param op union operation
+ */
+static void
+finish_and_destroy (struct Operation *op)
+{
+ GNUNET_assert (GNUNET_NO == op->state->client_done_sent);
+
+ if (GNUNET_SET_RESULT_FULL == op->spec->result_mode)
+ {
+ /* prevent that the op is free'd by the tunnel end handler */
+ op->keep = GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending full result set\n");
+ GNUNET_assert (NULL == op->state->full_result_iter);
+ op->state->full_result_iter =
+ GNUNET_CONTAINER_multihashmap32_iterator_create (op->state->key_to_element);
+ send_remaining_elements (op);
+ return;
+ }
+ send_done_and_destroy (op);
}
static void
handle_p2p_elements (void *cls, const struct GNUNET_MessageHeader *mh)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct ElementEntry *ee;
uint16_t element_size;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got element from peer\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "got element from peer\n");
- if ( (eo->phase != PHASE_EXPECT_ELEMENTS) &&
- (eo->phase != PHASE_EXPECT_ELEMENTS_AND_REQUESTS) )
+ if ( (op->state->phase != PHASE_EXPECT_ELEMENTS) &&
+ (op->state->phase != PHASE_EXPECT_ELEMENTS_AND_REQUESTS) )
{
- fail_union_operation (eo);
+ fail_union_operation (op);
GNUNET_break (0);
return;
}
element_size = ntohs (mh->size) - sizeof (struct GNUNET_MessageHeader);
- ee = GNUNET_malloc (sizeof *eo + element_size);
+ ee = GNUNET_malloc (sizeof (struct ElementEntry) + element_size);
memcpy (&ee[1], &mh[1], element_size);
ee->element.size = element_size;
ee->element.data = &ee[1];
ee->remote = GNUNET_YES;
- GNUNET_CRYPTO_hash (ee->element.data, ee->element.size, &ee->element_hash);
+ GNUNET_CRYPTO_hash (ee->element.data,
+ ee->element.size,
+ &ee->element_hash);
- /* FIXME: see if the element has already been inserted! */
+ if (GNUNET_YES == op_has_element (op, &ee->element_hash))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "got existing element from peer\n");
+ GNUNET_free (ee);
+ return;
+ }
- op_register_element (eo, ee);
- send_client_element (eo, &ee->element);
+ op_register_element (op, ee);
+ /* only send results immediately if the client wants it */
+ if (GNUNET_SET_RESULT_ADDED == op->spec->result_mode)
+ send_client_element (op, &ee->element);
}
* @param mh the message
*/
static void
-handle_p2p_element_requests (void *cls, const struct GNUNET_MessageHeader *mh)
+handle_p2p_element_requests (void *cls,
+ const struct GNUNET_MessageHeader *mh)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct IBF_Key *ibf_key;
unsigned int num_keys;
/* look up elements and send them */
- if (eo->phase != PHASE_EXPECT_ELEMENTS_AND_REQUESTS)
+ if (op->state->phase != PHASE_EXPECT_ELEMENTS_AND_REQUESTS)
{
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
if ((ntohs (mh->size) - sizeof *mh) != num_keys * sizeof (struct IBF_Key))
{
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
return;
}
ibf_key = (struct IBF_Key *) &mh[1];
while (0 != num_keys--)
{
- send_elements_for_key (eo, *ibf_key);
+ send_elements_for_key (op, *ibf_key);
ibf_key++;
}
}
/**
* Handle a done message from a remote peer
- *
+ *
* @param cls the union operation
* @param mh the message
*/
static void
handle_p2p_done (void *cls, const struct GNUNET_MessageHeader *mh)
{
- struct OperationState *eo = cls;
+ struct Operation *op = cls;
struct GNUNET_MQ_Envelope *ev;
- if (eo->phase == PHASE_EXPECT_ELEMENTS_AND_REQUESTS)
+ if (op->state->phase == PHASE_EXPECT_ELEMENTS_AND_REQUESTS)
{
/* we got all requests, but still have to send our elements as response */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got DONE, sending final DONE after elements\n");
- eo->phase = PHASE_FINISHED;
+ op->state->phase = PHASE_FINISHED;
ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SET_P2P_DONE);
- GNUNET_MQ_send (eo->mq, ev);
+ GNUNET_MQ_send (op->mq, ev);
return;
}
- if (eo->phase == PHASE_EXPECT_ELEMENTS)
+ if (op->state->phase == PHASE_EXPECT_ELEMENTS)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got final DONE\n");
- eo->phase = PHASE_FINISHED;
- send_client_done_and_destroy (eo);
+ op->state->phase = PHASE_FINISHED;
+ finish_and_destroy (op);
return;
}
GNUNET_break (0);
- fail_union_operation (eo);
+ fail_union_operation (op);
}
/**
- * Evaluate a union operation with
- * a remote peer.
+ * Initiate operation to evaluate a set union with a remote peer.
*
- * @param spec specification of the operation the evaluate
- * @param tunnel tunnel already connected to the partner peer
- * @param tc tunnel context, passed here so all new incoming
- * messages are directly going to the union operations
- * @return a handle to the operation
+ * @param op operation to perform (to be initialized)
+ * @param opaque_context message to be transmitted to the listener
+ * to convince him to accept, may be NULL
*/
static void
-union_evaluate (struct OperationSpecification *spec,
- struct GNUNET_MESH_Tunnel *tunnel,
- struct TunnelContext *tc)
+union_evaluate (struct Operation *op,
+ const struct GNUNET_MessageHeader *opaque_context)
{
- struct OperationState *eo;
-
- eo = GNUNET_new (struct OperationState);
- tc->vt = _GSS_union_vt ();
- tc->op = eo;
- eo->se = strata_estimator_dup (spec->set->state->se);
- eo->generation_created = spec->set->current_generation++;
- eo->set = spec->set;
- eo->spec = spec;
- eo->tunnel = tunnel;
- eo->mq = GNUNET_MESH_mq_create (tunnel);
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "evaluating union operation, (app %s)\n",
- GNUNET_h2s (&eo->spec->app_id));
+ struct GNUNET_MQ_Envelope *ev;
+ struct OperationRequestMessage *msg;
+ op->state = GNUNET_new (struct OperationState);
+ /* copy the current generation's strata estimator for this operation */
+ op->state->se = strata_estimator_dup (op->spec->set->state->se);
/* we started the operation, thus we have to send the operation request */
- eo->phase = PHASE_EXPECT_SE;
-
- GNUNET_CONTAINER_DLL_insert (eo->set->state->ops_head,
- eo->set->state->ops_tail,
- eo);
+ op->state->phase = PHASE_EXPECT_SE;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Initiating union operation evaluation\n");
+ ev = GNUNET_MQ_msg_nested_mh (msg,
+ GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST,
+ opaque_context);
+ if (NULL == ev)
+ {
+ /* the context message is too large */
+ GNUNET_break (0);
+ GNUNET_SERVER_client_disconnect (op->spec->set->client);
+ return;
+ }
+ msg->operation = htonl (GNUNET_SET_OPERATION_UNION);
+ msg->app_id = op->spec->app_id;
+ msg->salt = htonl (op->spec->salt);
+ GNUNET_MQ_send (op->mq, ev);
- send_operation_request (eo);
+ if (NULL != opaque_context)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "sent op request with context message\n");
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "sent op request without context message\n");
}
/**
- * Accept an union operation request from a remote peer
+ * Accept an union operation request from a remote peer.
+ * Only initializes the private operation state.
*
- * @param spec all necessary information about the operation
- * @param tunnel open tunnel to the partner's peer
- * @param tc tunnel context, passed here so all new incoming
- * messages are directly going to the union operations
- * @return operation
+ * @param op operation that will be accepted as a union operation
*/
static void
-union_accept (struct OperationSpecification *spec,
- struct GNUNET_MESH_Tunnel *tunnel,
- struct TunnelContext *tc)
+union_accept (struct Operation *op)
{
- struct OperationState *eo;
-
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "accepting set union operation\n");
-
- eo = GNUNET_new (struct OperationState);
- tc->vt = _GSS_union_vt ();
- tc->op = eo;
- eo->set = spec->set;
- eo->generation_created = eo->set->current_generation++;
- eo->spec = spec;
- eo->tunnel = tunnel;
- eo->mq = GNUNET_MESH_mq_create (tunnel);
- eo->se = strata_estimator_dup (eo->set->state->se);
- /* transfer ownership of mq and socket from incoming to eo */
- GNUNET_CONTAINER_DLL_insert (eo->set->state->ops_head,
- eo->set->state->ops_tail,
- eo);
+ op->state = GNUNET_new (struct OperationState);
+ op->state->se = strata_estimator_dup (op->spec->set->state->se);
/* kick off the operation */
- send_strata_estimator (eo);
+ send_strata_estimator (op);
}
/**
* Create a new set supporting the union operation
*
+ * We maintain one strata estimator per set and then manipulate it over the
+ * lifetime of the set, as recreating a strata estimator would be expensive.
+ *
* @return the newly created set
*/
static struct SetState *
struct SetState *set_state;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "union set created\n");
-
+
set_state = GNUNET_new (struct SetState);
set_state->se = strata_estimator_create (SE_STRATA_COUNT,
- SE_IBF_SIZE, SE_IBF_HASH_NUM);
+ SE_IBF_SIZE, SE_IBF_HASH_NUM);
return set_state;
}
/**
- * Destroy a set that supports the union operation
+ * Remove the element given in the element message from the set.
+ * Only marks the element as removed, so that older set operations can still exchange it.
*
- * @param set_state the set to destroy
+ * @param set_state state of the set to remove from
+ * @param ee set element to remove
*/
static void
-union_set_destroy (struct SetState *set_state)
+union_remove (struct SetState *set_state, struct ElementEntry *ee)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying union set\n");
- /* important to destroy operations before the rest of the set */
- while (NULL != set_state->ops_head)
- union_operation_destroy (set_state->ops_head);
- if (NULL != set_state->se)
- {
- strata_estimator_destroy (set_state->se);
- set_state->se = NULL;
- }
- GNUNET_free (set_state);
+ strata_estimator_remove (set_state->se, get_ibf_key (&ee->element_hash, 0));
}
/**
- * Remove the element given in the element message from the set.
- * Only marks the element as removed, so that older set operations can still exchange it.
+ * Destroy a set that supports the union operation.
*
- * @param set_state state of the set to remove from
- * @param element set element to remove
+ * @param set_state the set to destroy
*/
static void
-union_remove (struct SetState *set_state, struct ElementEntry *element)
+union_set_destroy (struct SetState *set_state)
{
- /* FIXME: remove from strata estimator */
+ if (NULL != set_state->se)
+ {
+ strata_estimator_destroy (set_state->se);
+ set_state->se = NULL;
+ }
+ GNUNET_free (set_state);
}
/**
* Dispatch messages for a union operation.
*
- * @param eo the state of the union evaluate operation
+ * @param op the state of the union evaluate operation
* @param mh the received message
* @return GNUNET_SYSERR if the tunnel should be disconnected,
* GNUNET_OK otherwise
*/
int
-union_handle_p2p_message (struct OperationState *eo,
+union_handle_p2p_message (struct Operation *op,
const struct GNUNET_MessageHeader *mh)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "received p2p message (t: %u, s: %u)\n",
ntohs (mh->type), ntohs (mh->size));
switch (ntohs (mh->type))
{
- case GNUNET_MESSAGE_TYPE_SET_P2P_IBF:
- handle_p2p_ibf (eo, mh);
+ case GNUNET_MESSAGE_TYPE_SET_UNION_P2P_IBF:
+ handle_p2p_ibf (op, mh);
break;
- case GNUNET_MESSAGE_TYPE_SET_P2P_SE:
- handle_p2p_strata_estimator (eo, mh);
+ case GNUNET_MESSAGE_TYPE_SET_UNION_P2P_SE:
+ handle_p2p_strata_estimator (op, mh);
break;
case GNUNET_MESSAGE_TYPE_SET_P2P_ELEMENTS:
- handle_p2p_elements (eo, mh);
+ handle_p2p_elements (op, mh);
break;
case GNUNET_MESSAGE_TYPE_SET_P2P_ELEMENT_REQUESTS:
- handle_p2p_element_requests (eo, mh);
+ handle_p2p_element_requests (op, mh);
break;
case GNUNET_MESSAGE_TYPE_SET_P2P_DONE:
- handle_p2p_done (eo, mh);
+ handle_p2p_done (op, mh);
break;
default:
- /* something wrong with mesh's message handlers? */
+ /* something wrong with cadet's message handlers? */
GNUNET_assert (0);
}
return GNUNET_OK;
}
-
+/**
+ * handler for peer-disconnects, notifies the client
+ * about the aborted operation in case the op was not concluded
+ *
+ * @param op the destroyed operation
+ */
static void
-union_peer_disconnect (struct OperationState *op)
+union_peer_disconnect (struct Operation *op)
{
- /* Are we already disconnected? */
- if (NULL == op->tunnel)
- return;
- op->tunnel = NULL;
- if (NULL != op->mq)
- {
- GNUNET_MQ_destroy (op->mq);
- op->mq = NULL;
- }
- if (PHASE_FINISHED != op->phase)
+ if (PHASE_FINISHED != op->state->phase)
{
struct GNUNET_MQ_Envelope *ev;
struct GNUNET_SET_ResultMessage *msg;
msg->result_status = htons (GNUNET_SET_STATUS_FAILURE);
msg->element_type = htons (0);
GNUNET_MQ_send (op->spec->set->client_mq, ev);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "other peer disconnected prematurely\n");
- union_operation_destroy (op);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "other peer disconnected prematurely\n");
+ _GSS_operation_destroy (op, GNUNET_YES);
return;
}
+ // else: the session has already been concluded
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "other peer disconnected (finished)\n");
- if (GNUNET_NO == op->client_done_sent)
- send_client_done_and_destroy (op);
-}
-
-
-static void
-union_op_cancel (struct SetState *set_state, uint32_t op_id)
-{
- /* FIXME: implement */
+ if (GNUNET_NO == op->state->client_done_sent)
+ finish_and_destroy (op);
}
+/**
+ * Get the table with implementing functions for
+ * set union.
+ *
+ * @return the operation specific VTable
+ */
const struct SetVT *
_GSS_union_vt ()
{
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